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Quality Standards for Temporary Traffic Control Devices (TTCDs) & Acceptable Delineation Methods for Vehicles

Introduction

Temporary traffic control devices are a necessary part of highway work zones. These devices warn motorists of hazards, advise them of the proper path through the work area, delineate areas where they may not operate and separate them from workers and opposing traffic. This is accomplished by a system of devices. The success of this system depends on the visibility of each device at the time of the project’s initial installation as well as throughout the life of the project. Since it is not practical to require new devices at all times, standards are needed to evaluate the condition of the devices to assure their continued effectiveness. The standards in this publication should aid in the determination of the quality of work zone traffic control devices.

This standard has been developed in an effort to offset the deterioration in the effectiveness of work zone traffic control devices. A determination of the device quality should be made at several stages: while in storage, during preparation for delivery to the jobsite, during initial set up and periodically during the course of the work.

These standards are intended to address the day-to-day operations of traffic control within a work zone and are not meant to cover the needs of emergency situations.

All devices and combinations of devices shall meet crashworthy performance criteria of the National Cooperative Highway Research Program (NCHRP) Report 350 for their respective categories and/or the most recent edition of the Manual for Assessing Safety Hardware (MASH; 2009, 2016, etc), as applicable and required.
NCHRP 350 sunset dates have been established by AASHTO and FHWA and have been adopted by ODOT. For transition purposes, NCHRP 350 end-of-use dates have been established by ODOT based on predicted useful service life of the particular device type.

Temporary Traffic Control related NCHRP 350 crashworthy sunset and end-of-use dates are as follows:

Device1

NCHRP 350 Sunset Date2

NCHRP 350 End-of-Use Date3

Cones

12/31/2019

12/31/2022 (3 years)

Drums

12/31/2019

12/31/2022 (3 years)


Tubular Markers


12/31/2019


12/31/2022 (3 years)

Longitudinal Channelizers

12/31/2019

12/31/2024 (5 years)

Portable Sign Supports

12/31/2019

12/31/2024 (5 years)

Barricades (Type I, II, III)

12/31/2019

12/31/2024 (5 years)

Portable Concrete Barrier

12/31/2019

12/31/2029 (10 years)

Portable Steel Barrier

12/31/2019

12/31/2029 (10 years)

Truck/Trailer Mounted Attenuators

12/31/2019

12/31/2029 (10 years)

Arrow Board

12/31/2019

TBD once a MASH/MUTCD compliant device is available.

Automated Flagger Assistance Device (AFAD)

12/31/2019

TBD once a MASH/MUTCD compliant device is available.

Digital Speed Limit (DSL) Sign Assembly

12/31/2019

TBD once a MASH/MUTCD compliant device is available.

Portable Changeable Message Sign (PCMS)

12/31/2019

TBD once a MASH/MUTCD compliant device is available.

Portable Traffic Signal

12/31/2019

TBD once a MASH/MUTCD compliant device is available.


Work Zone Egress Warning System


12/31/2019

TBD once a MASH/MUTCD compliant device is available.

Work Zone Queue Detection Warning System


12/31/2019

TBD once a MASH/MUTCD compliant device is available.

All items shall be as approved and listed on the department approved product list, if one has been established.
Devices to have been manufactured on or before the NCHRP 350 sunset date.
Acceptable devices may continue to be used between the NCHRP 350 Sunset date and the NCHRP 350 End-of-Use date provided they otherwise continue to meet the specifications and other quality standards for use.

Temporary Impact Attenuators follow the same NCHRP 350 sunset and end-of-use dates as the permanent impact attenuator installations, which is sooner than the other dates listed here. See Office of Roadway Engineering for an update on this NCHRP 350 end-of-use date.

Quality Classifications and Requirements

The quality of work zone traffic control devices in this standard has been divided into three categories: acceptable, marginal, and unacceptable. The Engineer shall be the sole judge as to the acceptability of placement and maintenance of all traffic control devices.

At the time of the initial set-up and at the time of major stage changes 100% of each type of device (sign, barricade panels and vertical panels, channelizing device, warning lights, arrow boards, portable changeable message signs, temporary pavement markings and raised pavement markers) shall be classified as acceptable. Throughout the duration of the project, the percentage of acceptable devices may decrease to 75% (25% marginal) only as a result of damage and/or deterioration during the course of the work. Any unacceptable device shall be replaced within 12 hours of notification.

Acceptable: Devices that meet the quality requirements herein for this classification and all other requirements in the plans and specifications shall be determined to be acceptable for use on highway construction or contract maintenance projects.

Marginal: Devices in this category shall not be delivered to the jobsite. Devices that meet the quality criteria for marginal as described herein may remain in the work zone until they reach 25% or until it is determined that they have become unacceptable.

Unacceptable: Devices in this category shall not be delivered to the jobsite. When found in the work zone, they must be removed and replaced within 12 hours of notification.

All devices and device supports shall remain in a position where good visibility can be maintained at all times. Any position that prohibits visibility automatically renders the device unacceptable.

The following photographs, together with the contract requirements of each specific project, shall be used as a guide to determine if the device is acceptable, marginal or unacceptable. A direct comparison of each device to this standard is not required for the rejection of devices; however, this standard shall be used to resolve disputes.

Quality Standard for Signs

Acceptable: To be considered acceptable, a sign shall meet all of the following conditions.

  • There may be abrasions on the surface, but very little loss of lettering.
  • The sign face is free of any residue.
  • There has been no touch-up of lettering.
  • The message is legible both day and night.
  • The back side is free of reflective materials except for identification markings and has a bare surface. The identification markings shall be no more than 1 inch in character height.
  • Sign size and material in combination with a MASH crashworthy compliant sign support configuration; or, sign size and material used on or before 12/31/2024 in combination with a NCHRP 350 crashworthy compliant sign support configuration.

Marginal: The sign is considered marginal if it meets any of the following conditions.

  • There are many surface abrasions on the sign face, and only a few are within the individual letters of the message.
  • Some color fading may be evident, but the background color and reflectivity are still apparent at night.

Unacceptable: The sign is considered unacceptable if it meets any of the following conditions.

  • Asphalt splatter, cement slurry, or abrasions are evident throughout the face of the sign.
  • A letter has a loss of more than fifty percent (50%) or more of its stroke area or portions of letters are missing making it confusing to identify.
  • There is noticeable color fading or loss of reflectivity is noticeable at night.
  • The message is illegible.
  • The sign has bends or dents that alter the size and/or shape of the sign.
  • Sign size and material in combination with a non-MASH and non-NCHRP 350 crashworthy compliant sign support configuration.
  • Sign size and material in combination with a non-MASH crashworthy compliant sign support configuration used on or after 1/1/2025.

Acceptable sign

Acceptable

Marginal sign

Marginal

Unacceptable sign

Unacceptable

Quality Standard for Portable Sign Supports

Acceptable: To be considered acceptable, a portable sign support shall meet all of the following conditions.

  • MASH crashworthy compliant portable sign support configuration; or, NCHRP 350 crashworthy compliant portable sign support configuration used on or before 12/31/2024.

Unacceptable: The portable sign support is considered unacceptable if it meets any of the following conditions.

  • Non-MASH and non-NCHRP 350 crashworthy compliant portable sign support configuration.
  • Non-MASH crashworthy compliant portable sign support configuration used on or after 1/1/2025.

Quality Standard for Barricade and Vertical Panels

Acceptable: To be acceptable, the panel shall meet all of the following conditions.

  • Panels are not deformed to an extent so as to decrease the panels target value.
  • There may be several abrasions on the surface but very little loss of reflective sheeting.
  • The orange is vivid and the stripes provide contrast that is clearly visible with low beam headlights at night.
  • MASH crashworthy compliant barricade or vertical panel; or, NCHRP 350 crashworthy compliant barricade or vertical panel used on or before 12/31/2024.

Marginal: The panel is considered marginal if it meets any of the following conditions.

  • There are many surface abrasions through the panel surface.
  • Some color fading is evident; however, it has no large areas of residue or missing reflective material.

Unacceptable: A panel is considered unacceptable if it meets any of the following conditions:

  • The surface is marred over a high percentage of the panel area.
  • There is a noticeable loss of reflectivity and obvious color fading.
  • Panels with asphalt splatter and/or cement slurry, or any combination of missing and covered reflective material would make the panel unacceptable.
  • Deformation of the support assembly so the sheeted panel is non-parallel to the roadway surface.
  • Rusty metal parts or unpainted wooden rails.
  • Non-MASH and non-NCHRP 350 crashworthy compliant barricade or vertical panel.
  • Non-MASH crashworthy compliant barricade or vertical panel used on or after 1/1/2025.

Acceptable barricade

Acceptable

Marginal barricade

Marginal

Unacceptable barricade

Unacceptable

Quality Standard for Channelizing Devices

Acceptable: To be considered acceptable, a channelizing device shall meet all of the following conditions:

  • Surface is free of asphalt splatter, cement slurry or other material and will readily clean.
  • The device’s shape should remain clearly identifiable with no significant distortion and must be free standing in its normal position.
  • Surface is free of punctures and abrasions.
  • The reflective bands have little or no loss of reflectivity, with only minor tears and scratches.
  • Any dents do not seriously reduce the reflectivity of the sheeting.
  • MASH crashworthy compliant channelizing device; or, NCHRP 350 crashworthy compliant drum, cone or tubular marker used on or before 12/31/2022; or NCHRP 350 crashworthy compliant longitudinal channelizer used on or before 12/31/2024.

Marginal: The channelizing device is considered marginal, if it meets any of the following conditions:

  • The surface has some asphalt splattering or cement slurry and may not be readily cleaned due to abrasions and discoloration.
  • The reflective bands have numerous tears and scratches; but have no large areas of residue or missing reflective material.
  • Any dents that do not reduce the strength of the device.
  • The device maintains its intended shape.
  • No more than one device in a row is missing.

Unacceptable: A channelizing device is considered unacceptable if it meets any of the following conditions:

  • Punctures and large areas stained with asphalt splatter or cement slurry that cannot be cleaned due to abrasions or discoloration.
  • There is noticeable fading of the device’s color.
  • Large areas of missing or stained reflective material.
  • Substantial deformation of a device, which reduces the original dimensions, or the device has lost the intended shape.
  • Several dents or fractures that affect stability or ability to retain the reflective sheeting.
  • Non-MASH and non-NCHRP 350 crashworthy compliant channelizing device.
  • Non-MASH crashworthy compliant drum, cone or tubular marker used on or after 1/1/2023; or, non- MASH crashworthy compliant longitudinal channelizer used on or after 1/1/2025.

Acceptable channelizing devices

Acceptable

Marginal channelizing devices

Maginal

Unacceptable channelizing devices

Unacceptable

Quality Standard for Warning Lights

Acceptable: To be acceptable, the warning lights shall meet all of the following conditions.

  • One hundred percent (100%) of all warning lights shall be operating properly. Any warning light that is out of alignment from the intended driver’s line of vision is considered not operating properly.
  • Warning light(s) used in conjunction with a MASH crashworthy complaint configuration; or, Warning light(s) used on or before the applicable NCHRP 350 End-of-Use date in conjunction with a NCHRP 350 crashworthy compliant configuration.

Marginal: The warning lights are marginal when all of the following conditions exist.

  • At least ninety percent (90%) of the warning lights are operating properly.

Unacceptable: The warning lights are unacceptable when any of the following conditions exist.

  • Less than ninety percent (90%) of the lights are operating properly.
  • Warning light(s) in conjunction with a non-MASH and non-NCHRP 350 crashworthy compliant configuration.
  • Warning light(s) in conjunction with a non-MASH crashworthy compliant configuration used on or after the applicable NCHRP 350 End-of-Use date.

Quality Standard for Flashing Arrow Board

Flashing Arrow Mode or Sequential Arrow

Acceptable: To be acceptable, the arrow board shall meet all of the following conditions.

  • All lamps are working.
  • All lamps dim properly.
  • All lamps are the same level of intensity.

Marginal: An arrow board is marginal when it meets the following condition.

  • Two (2) or less lamps are not working (none in the head) and the lamps all dim properly.
  • No more than two (2) lamps are at a different level of intensity.

Unacceptable: An arrow board is considered unacceptable when any of the following conditions exist.

  • Three (3) or more lamps are not working.
  • One (1) or more lamps are not working in the head.
  • The lamps are not dimming properly.
  • More than two (2) lamps are at a different level of intensity.

Flashing arrow mode - acceptable

Acceptable

Flashing arrow mode - marginal

Marginal

Flashing arrow mode - unacceptable

Unacceptable

Chevron Mode

Acceptable: To be acceptable, the arrow board shall meet all of the following conditions.

  • All lamps are working.
  • All lamps dim properly.
  • All lamps are the same level of intensity.

Marginal: An arrow board in this mode is considered marginal when it meets the following condition.

  • No more than one (1) lamp not working in any chevron segment and the lamps all dim properly.
  • No more than two (2) lamps are at a different level of intensity.

Unacceptable: An arrow board is considered unacceptable when any of the following conditions exist.

  • Two (2) or more lamps not working in any one chevron.
  • The lamps are not dimming properly.
  • More than two (2) lamps are at a different level of intensity.

Chevron - acceptable

Acceptable

Chevron - marginal

Marginal

Chevron - unacceptable

Unacceptable

Caution Mode – Bar or Corners

Acceptable: To be acceptable, the arrow board shall meet all of the following conditions.

  • No lamps are burned out.
  • All lamps are the same level of intensity.
  • All lamps dim properly.

Marginal: An arrow board is considered marginal when it meets the following condition.

  • Minimum of four (4) lamps are operating and the lamps all dim properly.
  • No more than two (2) lamps are at a different level of intensity

Unacceptable: An arrow board is considered unacceptable when any of the following conditions exist.

  • Less than four (4) lamps are operating.
  • The lamps are not dimming properly.
  • More than two (2) lamps are at a different level of intensity.

Caution bars - acceptable

Acceptable

Caution bars - marginal

Marginal

Caution - unacceptable

Unacceptable

Double Arrow Mode

Acceptable: To be acceptable, the arrow board shall meet all of the following conditions.

  • No more than one (1) lamp out in stem and none out in head.
  • All lamps dim properly.
  • All lamps are the same level of intensity.

Marginal: An arrow board is considered marginal when it meets the following condition.

  • No more than two (2) lamps out in stem and none out in head and dimming properly.
  • No more than two (2) lamps are at a different level of intensity.

Unacceptable: An arrow board is considered unacceptable when any of the following conditions exist.

  • More than two (2) lamps out in stem.
  • One (1) or more lamp out in either head.
  • The lamps are not dimming properly.
  • More than two (2) lamps are at a different level of intensity.

Double arrow - acceptable

Acceptable

Double arrow - marginal

Marginal

Double arrow - unacceptable

Unacceptable

Quality Standard for Portable Changeable Message Sign

Acceptable: To be acceptable, a PCMS shall meet the following condition.

  • One hundred percent (100%) of the pixels per character module shall be operating properly.
  • All lamps dim properly.
  • All lamps are the same level of intensity.

Marginal: A PCMS is marginal when it meets the following condition.

  • At least ninety percent (90%) of the pixels per character module shall be operating properly.
  • No more than two (2) lamps are at a different level of intensity.

Unacceptable: A PCMS is considered unacceptable if it meets any of the following conditions.

  • Less than ninety percent (90%) of the pixels per character module are operating properly.
  • The lamps are not dimming properly.
  • More than two (2) lamps are at a different level of intensity.

Portable message sign - acceptable

Acceptable

Portable message sign - marginal

Marginal

Portable message sign - unacceptable

Unacceptable

Quality Standard for Temporary Pavement Markings

Acceptable: Pavement marking tape or paint is acceptable when it meets the following condition.

  • All material (solid lines and dash lines) is in place and meets all material specifications.
  • Less than 10% of solid line is missing.

Marginal: Pavement marking tape or paint is marginal when it meets any of the following conditions.

  • Less than ten percent (10%) of message or symbol is missing.
  • Two (2) or less consecutive dash lines are missing.
  • Less than 20% of solid line is missing.

Unacceptable: Pavement marking tape or paint is considered unacceptable if any of the following conditions apply.

  • More than ten percent (10%) of tape, paint, message or symbol is missing.
  • More than two (2) consecutive dash lines are missing.
  • More than 20% of solid line is missing.

Quality Standard for Work Zone Raised Pavement Markers

Acceptable: WZRPMs are acceptable when they meet the following condition.

  • All WZRPMs are in place.

Marginal: WZRPMs are marginal if any of the following conditions are met.

  • 10 percent (10%) or less of all WZRPMs are missing.
  • Three (3) or less consecutive WZRPMs are missing.

Unacceptable: WZRPMs are considered unacceptable if any of the following conditions exist.

  • More than ten percent (10%) of all WZRPMs are missing.
  • More than three (3) consecutive WZRPMs are missing.

Quality Standard for Temporary Concrete Barrier

The following applies to all surfaces and connection components of the Temporary Concrete Barrier.

Acceptable: To be acceptable, the temporary barrier shall meet all of the following conditions.

  • The wall shall have smooth, flat surfaces made up of the original cast concrete material, with few minor blemishes.
  • Minor blemishes include:
    • No more than 3 spalls; and,
    • No spall greater than 12 inches in any surface direction; and,
    • No spall or chipped concrete greater than one and one-half (1.5) inches in depth.
  • The connecting loops are all sound and in place with no broken strands.
  • MASH crashworthy compliant temporary concrete barrier; or NCHRP 350 crashworthy compliant temporary concrete barrier used on or before 1/1/2030 (manufactured on or before 12/31/2019).

Marginal: Temporary barrier is considered marginal when it meets the following conditions.

  • The wall has a combination of minor blemishes and cracking but is still structurally sound.
  • Wall with repaired concrete areas less than 12 inches in any surface direction. The repairs shall have occurred on-site with Engineer approval. No repairs are permitted to any aspect of the connection.

Unacceptable: Temporary barrier is considered unacceptable when any of the following conditions exist.

  • The wall has one or more spalls 12 inches or larger in any surface direction.
  • Unsound concrete that could be easily removed when hit.
  • Spall(s) greater than one and one-half (1.5) inches in depth.
  • Exposed reinforcing steel.
  • One or more cracks with evidence of rusting.
  • Two or more cracks that are located within, or extend to, the lower half of the wall.
  • One (1) or more incomplete or improper connections
    • New Jersey shape/pin and loop: not connected; missing pin, nut or washers; pin seated, but not fully threaded with nut; one (1) or more broken, damaged or missing loop; etc.
    • F-Shaped/pin and loop: not connected; missing pin; one (1) or more broken, damaged or missing loop; etc.
    • New Jersey Shape and F-Shape/J-J hook: sections near but not seated properly; broken, damaged or missing hook; etc.
  • Non-MASH and non-NCHRP 350 crashworthy compliant temporary concrete barrier.
  • Non-MASH crashworthy compliant temporary concrete barrier used on or after 1/1/2030.
  • NCHRP 350 crashworthy compliant temporary concrete barrier manufactured after 12/31/2019.

Acceptable barrier

Acceptable

Marginal barricade

Marginal

Unacceptable barricade Unacceptable barricade
Unacceptable

Acceptable Delineation Methods for Vehicles

ODOT Construction and Material Specification 614.03 contains requirements for the delineation of work vehicles (also see Supplemental Specification 800).

The following figures depict acceptable methods of delineating material supply vehicles:

Acceptable delineation for vehicles

Acceptable delineation for vehicles

Additional examples of acceptable delineation of material supply vehicles.

Acceptable delineation for vehicles

Acceptable delineation for vehicles

Acceptable delineation for vehicles

Acceptable delineation for vehicles